[Elecraft] CODEC

[Tom]

Here's a possibility: RFI.
Wrap your (all!) USB wires through some 2" diameter mix 31 ferrite cores.  7 
or 8 turns will do fine.  Don't run the codecs over a hub.
Turn off all USB power savings as well.
73 Tom

-----Original Message----- 
From: Mike Greenway
Sent: Monday, October 1, 2018 11:49 AM
To: elecraft at mailman.qth.net
Subject: [Elecraft] CODEC

I have used for years a K3 on EME with WSJT using Line In/Out audio. 
Recently got a K3S and I am now using USB (CODEC) audio in and out of the 
radio.  In WSJT-10 they have Rate In/Rate Out monitors that should normally 
run at 1.000. Using the K3 analog audio these always stayed right on 1.000 
but now that I am using the USB audio they are jumping around quite often 
and getting out of range indicated in WSJT with a red marker.  I have tried 
two different computers and the same result.  I tried changing the sample 
rate in the computer audio settings but no change in the problem.  I plan to 
go back to analog Line In/Out on the K3S unless someone has an idea on how 
to settle down the Rate In/Out fluctuations.  I have not found anything in 
the K3S that might affect this.  You can reply off line if you like.  73 
Mike K4PI
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